Slate roof



(No Mdel.) A

VW.. RBDETT.

SLATEv ROOF. No. 357,503. Patented-feb. 8, 1887'.

UNITED STATES PATENT EETCE.

SLATE ROOF..

SPECIFICATION forming part of Letters Patent No. 357,503. dated February8,1887.

Application tiled April 23, 1886. Serial No. 199,929. (No model.)

following is a specification, reference being had therein to theaccompanying drawings.

The object of my invention is to provide a slate roof of suchconstruction that the slates may be laid direct-ly on the rafters, ifdesired,`

and the joints thereof be so tight that it will be practicallyimpossible for any rain or snow to get through the roof.

In the accompanying drawings, Figure l is a plan view of a portion of aroof embodying my invention; and Fig. 2 is a section of the same on line2 2, Fig. 1. Figs. 3 and 4t are detail views of one of my non-c0nductingslates.

A denotes the rafters of the building, and B the larger slates,(preferably about fourteen by twenty-four inches in size,) which may benailed directly to the rafters, thesev slates being laid lengthwise ofthe roof, or with their sides extending up the roof, as shown in thedrawings. 'These slates have a lap of about two inches, and between thelapping edges I prefer to spread a narrow line of hydraulic orotherwaterproof cement. (Indicated by a.) The joints b between the endsof the slates B are covered by narrow overlapping cap-slates C, which(excepting the lowest one) are of a length which is greater than thewidth of the large slates B, so that each of the said capslates willcover the nails c, by which the capslate below is secured in place.Between the cap-slates C and the large slates B, I prefer. to spread aline or coating of cement. (Indicated by d.

Tha cement between the lapping edgesof the slates B, and also betweenthe slates B and the cap-slates C, is preferably appliedin a semifluidcondition by a reservoir-syringe, a .line of cement being run along theedges of the upper surfaces of the slatestj ust before the overlappingslates are laid in place.

To rendermy improved roof more or less impervious to heat, I prefer tocover the slates on their under sides with a coating of some adhesivepaint, on which is sprinkled, while the paint is still wet, sawdust orother similar fine non-conducting material, which will permanentlyadhere to the slate when the paint is dry.

Having thus described my invention, I claim and desire to secure byLetters Patentl. In a slate roof, the combination, with the largeoverlapping sla'tes arranged lengthwise of the roof, ofthe smalleroverlapping capslates covering the joints between the ends of do thelarge slates, and having a length which is substantially as set forth.

2. In a slate roof, the combination, with the large overlapping slatesB, extending lengthwise of the roof, of the overlapping cap slates O,covering the j oints between the ends of the slates B, and having alength which is greater than the width of the said slates B, and alinevgreater than the width of the said slates B,

and a line or joint of cement between the said cap-slates C andthe'slates B, substantially as set forth.

4. A slate roof composed of slates provided on their under sides with anon-conducting coating consisting of a comminuted material secured tothe slates by an adhesive substance, substantially as set forth.

In testimonywhereof- I affix my signature in presence of two witnesses.

WILLIAM BEDETT.

Witnesses:

W. It. SHAEEEL, D. SHAEEE.

greater than the width of the said large slates,

